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The velocity profile upstream in the 20cm section is varible, symmetric with radius r and given by V=180-r^2 in cm/sec with r in cm. Determine the mass average velocity in the 5cm section.
If the outer race rotates at 500 RPM, what is the maximum number of hours of service for which you would predict 90% reliability (90% probability of not failing)?
A rigid tank, which has a volume of 0.1 m^3, contains 1kg of water at 100 Celcius. Calculate the time until the tank reaches 200 Celcius, and the final pressure in the tank?
Express the finite difference formulation of the boundary nodes 0 and 8 for the case of no heat generation. Also obtain the finite difference formulation for the rate of heat transfer at the left bo
If a number of the hot air balloons started from the same location, sketch the streakline formed by the balloon at t=3hrs. The balloons start at the origin.
Determine the ambient temperature in the oven, if the steel rods were to be heated to the desired temperature within 10 minutes.
The tube wall temperature is maintained at 290 K. If the mass flow rate of the vapor is .01 kg/s, what is the rate of condensation of the refrigerant?
Determine the maximum wall temperature associated with a heat flux of 10^5 w/m^2 at the inner wall of the tube at a location .4 m downstream from the onset of boiling for a tube fabricated of pure C
Find the final mass of nitrogen in the tank and the final temperature of the nitrogen assuming constant specific heats at room temperature for nitrogen.
Determine the smallest value of theta for which the rod will not move. (theta is the angle between the floor and the rod)
After the bullet passes through A it becomes embedded in block C and all three objects come to stop in the positions. Determine the intial speed of the bullet V0.
Determine the state of the ammonia after the throttling process. If the ammonia is a saturated liquid-vapor mixture, calculate the quality x2.
Verify your finite difference code solution against a semi-infinite slab solution. For this verification, use a constant surface heat flux boundary condition.
If one-half of the liquid is evaporated during this constant-pressure process and the paddle-wheel work amounts to 400kJ, determine the voltage of the source.
Determine: The systems coefficient of performance. The power required to service a 400kW cooling load. What would be the coefficient of performance if the compressor had an efficiency of 80%.
Modify the finite difference MATLAB code to include the meltdown surface heat flux (time dependent). Plot the temperature distribution at t = 0 and two other times prior to container failure.
Determine the mass flow rate of hot water withdrawn from the tank during the shower and the average temperature of mixed water used for the shower.
Steam at 40degrees C condenses on the outside of a 6.40-m-long, 3.7-cm-diameter thin horizontal copper tube by cooling water that enters the tube at 25degress C at an average velocity of 2.15m/s.
Solve using the ideal-gas law, the generalized compressibility factor, and steam tables. Plot the percent error involved in the ideal-gas approximation against temperature, and discuss the result.
Determine the maximum thermal efficiency of the power plant. Why is it misleading to use the temperatures given to calculate this value?
Calculate the amount of work input a refrigerator needs to make ice cubes out of a tray of 0.25 kg of liquid water at 10 C.
A disk of 180 mm radius rotates at the constant rate w2=12 rad/sec with respect to arm CD, which itself rotates at the constant rate w1=8 rad/sec about the Y axis.
The inlet section of a vacuum cleaner is a rectangle, 1 in by 5 in. The blower is able to provide suction at 25 cubic feet per minute. What is the average velocity at the inlet, in m/s?